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R; Z. LIDDLE 8v R. MORRIS.

Stove Grate.

No. 233,93. Pategted Nov. 2,1880.

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NA PETERS, PHOTOMTHOGRAPFIER. WASHKNGYON. D C.

UNITED STATES PATENT OFFICE..

ROBERT Z. LlDDLE AND ROBERT MORRIS, OF ALBANY, NEW YORK, ASSIGN ORS TO JOHN S. PERRY, OF SAME PLACE.

STOVE-G RATE.

SPECIFICATION forming part of Letters Patent No. 233,939, dated November 2, 1880,

Application filed September 2l, 1880. (No model.)

To all whom it may concern Be it known that we, ROBERT Z. LIDDLE and ROBERT MORRIS, of A Iba-ny, in the county of Albany and State of New York, have invented anew and useful Improvement in Stove- Grat-es, of which the following is a specification.

This invention relates to the class of stovegrates known as duplex7 grates, or grates provided with a cut-off, which is interposed between the main grate and the fuel in the dre-chamber while the main grate is being dumped; and the present improvement consists in the construction of the frame in which the grate and cut-off are hung or mounted, and the combination with such frame of removable straps; also, in the combinations of devices by which the grate and cut-0E are operated, as hereinafter described and claimed.

The invention is illustrated in the aecompanying drawings, in which- Figure 1 is a plan view of' the stove-grate containing the improvements. Fig. 2 is an end elevation ot' the same, and Fig. 3 is a section through the line a: m of Fig. 1, showing the parts beyond in elevation.

In the drawings, Arepresents the main part of the frame, in which the grate and cut-off are mounted, to which are attached supportinglegs J. This frame Vmay be-of any desired contour to occupy the lower end of the firechamber of a stove or other heating structure. In the ends of this frame are depressions, which constitute the bearings for the journals of the grate and the cut-off, and these are preferably formed by giving the frame the proper curves in casting, the depressions which are to receive the journal of the cut-olf being sufficiently below the horizontal surface of the grate-bars to give the lever-arm F the desired purchase to easily lift the grate.

D are end straps, provided with downward projections d, which, in connection with the depressions in the frame A, complete the bearings for the journals of the cutoff. The ends of these straps are intershouldered with the frame A, as shown in Fig. 2, and are held in place and made easily removable by means of nut-screws c, as shown in Figs. l and 2, the heads of the screws forcing the straps tightly against their bearings on the frame A.

The removable arrangement of the straps D permits the grate or the cut-off, when they become burned out or broken, to be easily replaced without removing the frame from its position.

B is the main grate, and is provided with journals tta, which rest in the bearings formed by depressions and projections in the frame A and straps D, as before described. The outer bars of this grate are shorter than the others, and are provided with a downwardl y-proj ectin g lug or hook, E, upon their ends, which, in connection with a similar laterally-projecting lug, b, on the ends of thelever-arms F, prevents the grate B from dropping too low or away from the control of the lever F.

C is the cutoff or supplemental grate, and occupies the position shown in Figs. l and 2 when the main grate is horizontal. It isjournaled in the frame A, as before described, and one of the journals is extended outwardly to form the shank H, whose end is properly squared to receive a wrench.

F F are lever-arms attached to the journals of the cut-off, and forming an angle with the same. On the ends of these lever-arms are lugs b, which act against the under side of the outer grate-bars, and when the grate B is dumped are brought in contact with the projections E.

Kis a projection rising from the edge of the cut-off C, which, by striking against the frame A, limits the movement of the cutoff in that direction and brings the edge about flush with the grate-bars B. A forward and downward projection on the frame A would accomplish the same result.

The edge of the cut-off is provided with a series of teeth, whose edges are thin, so that it will work its way readily through the cinders or clinkers and separate them from the superimposed mass of fuel, and, it' necessary, will cut or slice them.

The surface of the cut-oft' or grate C, with the exceptions of the edge depressions, which forni the teeth,is solid-that is, it is not arranged with alternate bars and open spaces, as is the grate B, so that when turned into the position shown by dotted lines in Fig. 3 it will not permit the superimposed fuel to pass through it 5 but when in this position there will be left sufcient openings around its margin and between the bars of the dumped grate B and between the short bars e e e, attached IOO to the frame A, for the passage of air to the fuel. This feature makes this grate very eonvenient and desirable for stoves and ranges in which it is desired to use wood and coal interchangeably-e. g.. coal in winter and wood in summer-coal requiring an open grate and Wood a close grate for their most successful combustion.

For the use of the grate for burning wood, the cut-oli" C and the main grate Il are brouu'ht into the position shown by dotted lines in Fig. 3, and are retained in that` position.

Y The operation ofthe above-described mechanism. when used to slice the tire at the bottom ot' the fuel-chamber in order to remove oiuders, clinlt'ers, &c., is brietly as follows: The cut-off. being,r in position, as shown bythe full lines in Fig'. 3, is brought into the position shown b v the dotted lines in same tigure by partially turning the shank Il. As this shank is tlirned the end ot' the leverarm F, which supports the grate B, passes to :i lower plane, and the grate B descends by its own weight and that ofthe fuel until it reaches the position shown by the dotted lilies in Fig. 3, when its further descent is arrested bythe contact of the lug E on the end bars of the grate with the lug b on the end of the leverarm F. This permits the accumulated ashes and cinders to fall down the inclined grate, while the cut-cti', by its continuous advance over the grate as it descends. will prevent the tireand superimposed fuel from falling. When the movement ofthe shank II is reversed the cut-oi will be returned to its rst position and the grate l will be lifted by the lug b on the lever-arm I" acting upon the under side of the grrate-bars- The advantages ot' this grate are that it is very simple in its construction and cheaply made, requiring no special attachment to thc stove, but can be set upon inwardly-projecting ledges or supports located so as to bring;r the grate into proper relation with the bottom of the Ere-chamber. The means employed for changing the position of the grate and cut-oli` are simple and not liable to be broken or get out of place or repair, and in this respect differ materially from the use of cog-wheels and other complicated and expensive devices which have heretofore been used. The easily-removable end straps, D, permity the grate or the cutot' to be readily replaced without the trouble of removing the frame from its place, and the solid surface of the eut-oitl perfectly adapts the grate to be used interchangeably and without alteration for burning Wood or coal.

What is claimed as new isl. A cut-oi` or supplemental grate provided with a substantially solid or continuous surface, in combination with an open dumpinggrate, so that when the cut-ofi' is in position over the dumped grate there will be an airspace around its margin and between the bars ot' the dumped grate, whereby the compound grate is adapted to burn either coal or wood interchangeably, substantially as set forth.

2.. In a duplex cut-offgrate,a main framein which are depressions for thejournals of the main grate and the cut-ofi", in combination with removable straps secured to the main frame, substantially as and for the purpose set forth.

3. In a. duplex cut-off grate, a. lever-arm attached to the cut-ofi', in combination with the dumping-grate, substantially as and for the purpose set forth.

4. ln a duplex cut-off grate, a lug, b, on the end ofthe leverarm F, in combination with a lug, E, on the end of the grate-bars B, substantially as and for the purpose set forth.

5. In a duplex cut-off grate, the combination ofthe main grate B, the cut-oli' O, and the short bars e e e, attached to the frame A, substantially as and for the purpose set forth.

6. In a duplex cavoli' grate, a stop, K, at tached to the edge of the cut-o', in combination with the frame A, substantially as and for the purpose set forth.

ROBERT Z. LIDDLE. ROBERT MORRIS. lVitnesses ANDREW GRAHAM, JN0. 1). WHISH. 

